Tube hanger



L97ZZ47 Get. 16, 1934. w. H. scoTT Er AL TUBE HANGER L Filed Nov. 7,1932 R n. w. m w@ ATTORNEY i Patented Oct. 16, 1934 4 l I,

UNITED STATES PATENT l yOFFICE TUBE HANGER William H. Scott, Chicago,Ill.,.and Jesse C. f

Ducommun, Hammond, Ind., assignors to Standard Oil Company, Chicago,Ill., a. corporation of Indiana Application November 7, 1932, Serial No.641,572

s claims. (Cl. 122-510) This invention relates to improvements in tubeare placed in juxtaposition in a plane which is hangers or supports. Infurnaces, and particuat right angles to the axes of the tubes which arelarly oil cracking and oil reducing furnaces, in to be supported by thehangers. which tubes are suspended for heating purposes The hanger 3 isprovided at its upper end with it is frequently desirable to suspend thetubes in bolt holes 4a by means of which thehanger is 60' a plurality ofhorizontal rows. Thus, in oil stills, supported from the roof of thefurnace.- Toward this arrangement of suspending tubes is frethe lowerportion of the hanger the body thereof quently desirable. Our inventionhas for an obis made somewhat wider than any of the remainject anarrangement whereby tubes may be susing part of the support or bracketexcept the top pended in a plurality of horizontal banks in suchthereof. This widened portion 'l is provided with 65 fashion that theindividual hangers or supports two semi-circular indentations 8 adaptedto comay be readily removed and replaced without the operate withadjacent and opposed indentations necessity of disarranging the entireassembly of upon adjacent supports and for the purpose of supports.embracing and supporting 'the tubes A. Adja- Our invention involvesspecifically, furnace cent the bottom of the holder or bracket are two 7tube supports which are subjected to intensely keyed holes 9. A pin 6,provided at one end With high temperatures requiring that supports be aweight 10 and at the other end with a key 11,- made of special heatresistant alloys. These alis provided for insertion through a key in theU-' loys usually contain high percentages of chroshaped member 5andthence through the keyedl mium and are rather fragile and difficultto maorice 9 of the hanger or bracket 3 in order to chine. Other objectswill be apparentes our provide readily removably supporting means fordescription proceeds. attaching the stirrups or U-shaped members 5 Ourinvention is illustrated in the accompanyto the plate 3. When theU-shaped members 45 ing drawing in which Figure 1 illustrates an asareattached to the holder 3 the said U-shaped sembly of one type of tube`hanger or support members afford a support for the tubes B. 80

arranged in accordance with our invention; Fig- The mode of attachingthe U-shaped members ure 2 shows in detail an elevation view of one tothe bracket-is readily apparent from this deof our improved tubehangers; Figure 3 shows scripton. thus the keyed end 0f the Din 6 iSinan edge or side view of this type of tube hanger; serted with both key11 and weight 10 in an up- Figure 4 shows an elevation view of the keyedward position. The key thus passes through the 85 pin means usedinattaching the U-shaped memkeyed orifice in the U-shaped member 5, the

bers to the main part of the tube hanger; Figure corresponding keyedorifice in the bracket 3 and 5 shows-an end view of the weighted end ofthe the corresponding keyed Oree 0f the Second U- pin; Figure 6 shows anend View of the keyed Shaped member 5. When the key has thus been end ofthe pin; Figure 7 shows an assembly of a inserted through all threeelements the pin is 9 modified arrangement of tube hanger, Figure apermitted to turn through an angle of 180, in shows in detail anelevation view of the modified Whieh DOSiiiOh the Weighted end 10 tendsi90 main-- tube hanger; and Figure 9 shows an edge or side tain it. Inthis position the U-shaped members View of this modified type of tubehangen Fig- 5 are rmly attached to the bracket 3 but may be ure 10 showsa horizontal section taken along the readily removed by the simpleexpedient of turn- 95 line 10-10 of Figure 2. ing the pin to an angle of180 from its normal As shown in the drawing, reference 1 indicates DOSOHand withdrawing the keyed end 0f the the flat suspended arch or roof ofa furnace. Din `through the keyed Oriee member 0f the U- Thus, forexample, it may be the top or roof of Shaped members 5 and bracket 3 thecombustion chamber of an ou Suu. 2 indi- The modified arrangement Shownin Figures "l, 10

Cates a, suitable metalli; supporting member such 8 and 9 iS SomewhatSimilary in that the brackets as a channel to which the tube hangers 3are at- O1' holders 23 are Supported from the Channel tached by means ofsuitable elements such as bolts member 22 by means 0f Suitable bolts 24.The 4. In the arrangement illustrated in Figure 1 support elements 23are arranged in juxtaposiof the drawing we have shown two rows of oiltion in a plane which is perpendicular to the 105,

tubes, the upper row being indicated by A and the axis 0f the tubeswhich are to be supported, RS lower by B. Since the lindividual -hangersare shown in Figure 7 0f the drawing. Since the insimilar a betterunderstanding of our design dividual tube holders 23 are identical asomewhat thereof will be obtained from a. consideration of betterunderstanding of the construction may be Figure 2, it being understoodthat the hangersobtained by consideration of Figures 8 and 9 of 110 thedrawing. The upper end of the holder 23 is cored with suitable holes24a. In order to assist in keeping contiguous elements in properposition and also to serve as a seal in the tile arch we have providednear the middle of the holder 23 suitable shoulders 23a.. Theseshoulders we have found to be of assistance but not'essential. Near thelower extremity of the holder 23 we have provided a shoulder 28, theupper surfaces of which are rounded as shown at 30 to provide partialsupport for tubes A. It will be apparent that when two or more of theholders 23 are in juxtaposition the rounded portions 30 of adjacentholders will afford a semi-circular support for the tubes A.

Near the lower end of each plate 23 we have provided bolt holes 29. Aremovable U-shaped member 25 is supported from the main tube hanger 23by means of bolts 26. The extremity of each leg of the U-shaped member25 is shaped in the form of a yoke or fork adapted to embrace the lowerend of the hanger 23. Bolt holes 29a and 29h are cored through eachelement of each yoke in such a fashion that a bolt may be passed througheach leg of the yoke, 27a and 27h, and through the bolt holes 29C of theholder 23. It will be readily apparent that we have provided means forthe ready assembly and removal of U- shaped member 25.

Our invention is an improvement over the type of tube hanger shown in U.S. Patent 1,815,750 granted to George W. Watts. The tube hangersdisclosed in the Watts patent and in this application are usuallyrequired to be of cast construction because of the difficulty ofmachining these alloys. One of the most suitable alloys for the purposeconsists of nickel and 20% chromium. Due to the construction and themechanical properties of the alloy, difliculty must unavoidably be foundin the failure of an occasional tube hangerparticularly in an oilfurnace in which both tubes and tube hangers are subjected to intenselyhigh temperatures. Moreover, the tubes subjected to these hightemperatures sometimes bulge or fail. In the arrangement shown in theWatts patent the removal of a defective hanger or defective tubenecessitated the removal of all of the hangers which function to suspenda single tube. In our arrangement a defective support may be readilyremoved and replaced by a. perfect one without the necessity of removingthe entire assembly of hangers for a given tube and also without thenecessity of removing any tubes.

Moreover, the point of most frequent failure in the tube hanger shown inthe prior art was that portion of the hanger below and directlyembracing the lowerrnost row of tubes. Thiswas because the lowerextremity of the tube holder was close to and more directly exposed tothe source of greatest heat in the furnace. Our improved tube hangeravoids this diiiiculty in several ways. In the rst place, the U-shapedmembers may be made somewhat thicker than, or of different and more heatresistant material than the main portion of the tube support. Moreover,if the U-shaped member fails it may be readily replaced without thedelay and diiculty caused by removing the entire tube hanger or all ofthe supportsA of a given tube.

It must be apparent that we have shown and described an improved tubehanger which is not subject to the drawbacks of the prior art and whichmay be readily employed in supporting tubes in furnaces which aredesigned to function at extremely high temperatures but which mayreadily be used in refrigerators.

Since many different embodiments of this nvention, apparently differingwidely, may be made without departing from the spirit thereof, it is tobe understood that we do not limit ourselves to the foregoingdescription except as indicated in the following patent claims.

We claim:

1. A furnace structure including a plurality of rows of horizontaltubes, a support, and a plurality of tube holders depending from saidsupport, each holder having parts co-operating with partsof adjacentholders for carrying two tubes of one horizontal row of tubes and eachholder having holder means for supporting one tube of another horizontalrow of tubes, said holder means being detachable from said holder andfrom said tube.

2. A furnace structure including a plurality of rows of horizontaltubes, a support, and a plurality of tube holders depending from saidsupport, each holder having parts co-operating with parts of adjacentholders for carrying two tubes of one horizontal row of tubes and eachholder having at its lower extremity detachable holding means forsupporting one tube of another 'horizontal row of tubes, said detachableholding means comprising a pair of U-shaped members adapted to enclosethe tube. in parallel planes, each perpendicular to the axis of thetube.

3. A furnace structure including a plurality of rows of horizontaltubes, a support, and a plurality of tube holders depending from saidsupport, each holder having parts co-operating with parts of adjacentholders for carrying two tubes of one horizontal row of tubes and eachholder having at its lower extremity detachable holding means forsupporting one tube of another horizontal row of tubes, said detachableholding means comprising a pair of U-shaped members adapted to enclosethe tube in parallel planes, each perpendicular to the axis of the tube,the upper ends of said U-shaped members being secured to said holder bymeans of removable pms.

4. A furnace structure such as is claimed in claim 3 in which oneU-shaped member is supported on each side of the holder and in which thepin members are weighted at one end thereof and keyed at the other endthereof, being thus adapted for ready insertion into and removal fromkey-shaped bores in the holder and the extremities of the U-shapedmembers.

5. A tube hanger construction, for suspending a bank of tubes in afurnace, the tubes in one row of the bank being staggered with respectto the tubes in another row of the bank and parallel therewith,comprising, a support, a plurality of brackets depending from saidsupport, each bracket having parts cooperating with parts of adjacentbrackets, at adjacent edges thereof, for carrying two tubes of one ofsaid rows and each bracket having holder means for supporting one tubeof said other row, said holder means being detachable from said bracketand from said tube.

6. A tube hanger comprising a member adapted to be suspended from asupport, a stirrup for embracing a tube in a plane transverse to theaxis of the tube and removable pins for detachably securing said stirrupto said member, said pins being laterally weighted at one end and beingkeyed at the other end, said member and said stirrup having keywayscorresponding to the keys on said pins. l

7. A tube hanger construction for suspending a bank of tubes in afurnace, the tubes in one row of the bank being staggered with respectto the tubes in another row of the bank, comprising, a plurality ofbrackets, each bracket being provided with a plurality of correspondingtube engaging surfaces for supporting the tubes in diierent horizontalplanes and different vertical planes, each of said brackets have avertically extending portion adapted to be secured to and to depend froma portion of the roof structure of the furnace, said brackets, whensecured to the roof structure and disposed in alignment with one anotherin substantially one plane transverse the axis of the tubes and injuxtaposition to one another, each supporting one tube in cooperativeconjunction with a contiguous bracket and each having at its lowerextremity detachable holding means for supporting another tubeindependently lof every other bracket in the same plane, said detachableholding means comprising a pair of U-shaped members adapted to enclosethe tube in parallel planes each perpendicular to the axis of the tube,one ofthe U-shaped members being located on each side of the bracket anddetachably secured thereto by pin members weighted at one end thereofand keyed at the other end thereof, said holders and said U-shapedmembers having key'v and shaped to support a tube therein, said stirrupbeing attached to its supporting bracket by means of keyholes in saidstirrup which register with like holes in said bracket and key membersnsertable in said holes.

WILLIAM H. SCOTI. JESSE C. DUCOMMUN.

